fabric-results.md

{
  "resultsMapping": [
    ["expressionEval", { "expression": "{...steps[0], sku: steps[0].id}" }]
  ]
}

{
  "resultsMapping": {
    "...": [["get", { "path": "steps[0]" }]],
    "sku": [
      ["get", { "path": "steps[0].id" }],
      ["expressionEval", { "expression": "replace('prod_', '', previousStep)" }]
    ]
  }
}

{
  "resultsMapping": {
    "...": [["get", { "path": "steps[0]" }]],
    "sku": [
      ["get", { "path": "steps[0].id" }],
      [
        "expressionEval",
        { "expression": "join('', slice(3, undefined, previousStep))" }
      ]
    ]
  }
}